/*
- md.h : Multiple Devices driver for Linux
- Copyright (C) 1997-1999 Ingo Molnar
- <mingo@redhat.com>
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- You should have received a copy of the GNU General Public License
- (for example /usr/src/linux/COPYING); if not, write to the Free
- Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-/* don't include the kernel RAID header! */
-#define _MD_H
-
-typedef unsigned int md_u32;
-typedef unsigned short md_u16;
-typedef unsigned char md_u8;
-
-#include <linux/major.h>
-#include <sys/ioctl.h>
-
-/*
- * Different major versions are not compatible.
- * Different minor versions are only downward compatible.
- * Different patchlevel versions are downward and upward compatible.
- */
-
-struct md_version {
- int major;
- int minor;
- int patchlevel;
-};
-
-/*
- * default readahead
- */
-#define MD_READAHEAD (256 * 1024)
-
-/* These are the ioctls for md versions < 0.50 */
-#define REGISTER_MD_DEV _IO (MD_MAJOR, 1)
-#define START_MD _IO (MD_MAJOR, 2)
-#define STOP_MD _IO (MD_MAJOR, 3)
-
-/* status */
-#define RAID_VERSION _IOR (MD_MAJOR, 0x10, struct md_version)
-#define GET_ARRAY_INFO _IOR (MD_MAJOR, 0x11, md_array_info_t)
-#define GET_DISK_INFO _IOR (MD_MAJOR, 0x12, md_disk_info_t)
-#define PRINT_RAID_DEBUG _IO (MD_MAJOR, 0x13)
-
-/* configuration */
-#define CLEAR_ARRAY _IO (MD_MAJOR, 0x20)
-#define ADD_NEW_DISK _IOW (MD_MAJOR, 0x21, md_disk_info_t)
-#define HOT_REMOVE_DISK _IO (MD_MAJOR, 0x22)
-#define SET_ARRAY_INFO _IOW (MD_MAJOR, 0x23, md_array_info_t)
-#define SET_DISK_INFO _IO (MD_MAJOR, 0x24)
-#define WRITE_RAID_INFO _IO (MD_MAJOR, 0x25)
-#define UNPROTECT_ARRAY _IO (MD_MAJOR, 0x26)
-#define PROTECT_ARRAY _IO (MD_MAJOR, 0x27)
-#define HOT_ADD_DISK _IO (MD_MAJOR, 0x28)
-#define SET_DISK_FAULTY _IO (MD_MAJOR, 0x29)
-
-/* usage */
-#define RUN_ARRAY _IOW (MD_MAJOR, 0x30, struct md_param)
-#define START_ARRAY _IO (MD_MAJOR, 0x31)
-#define STOP_ARRAY _IO (MD_MAJOR, 0x32)
-#define STOP_ARRAY_RO _IO (MD_MAJOR, 0x33)
-#define RESTART_ARRAY_RW _IO (MD_MAJOR, 0x34)
-
-
-/* for raid < 0.50 only */
-#define MD_PERSONALITY_SHIFT 16
-
-#define MD_RESERVED 0UL
-#define LINEAR 1UL
-#define STRIPED 2UL
-#define RAID0 STRIPED
-#define RAID1 3UL
-#define RAID5 4UL
-#define TRANSLUCENT 5UL
-#define LVM 6UL
-#define MAX_PERSONALITY 7UL
-
-/*
- * MD superblock.
+ * Copyright (c) 2002 Silicon Graphics, Inc. All Rights Reserved.
*
- * The MD superblock maintains some statistics on each MD configuration.
- * Each real device in the MD set contains it near the end of the device.
- * Some of the ideas are copied from the ext2fs implementation.
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
*
- * We currently use 4096 bytes as follows:
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
- * word offset function
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like. Any license provided herein, whether implied or
+ * otherwise, applies only to this software file. Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
*
- * 0 - 31 Constant generic MD device information.
- * 32 - 63 Generic state information.
- * 64 - 127 Personality specific information.
- * 128 - 511 12 32-words descriptors of the disks in the raid set.
- * 512 - 911 Reserved.
- * 912 - 1023 Disk specific descriptor.
- */
-
-/*
- * If x is the real device size in bytes, we return an apparent size of:
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
- * y = (x & ~(MD_RESERVED_BYTES - 1)) - MD_RESERVED_BYTES
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA 94043, or:
*
- * and place the 4kB superblock at offset y.
- */
-#define MD_RESERVED_BYTES (64 * 1024)
-#define MD_RESERVED_SECTORS (MD_RESERVED_BYTES / 512)
-#define MD_RESERVED_BLOCKS (MD_RESERVED_BYTES / BLOCK_SIZE)
-
-#define MD_NEW_SIZE_SECTORS(x) ((x & ~(MD_RESERVED_SECTORS - 1)) - MD_RESERVED_SECTORS)
-#define MD_NEW_SIZE_BLOCKS(x) ((x & ~(MD_RESERVED_BLOCKS - 1)) - MD_RESERVED_BLOCKS)
-
-#define MD_SB_BYTES 4096
-#define MD_SB_WORDS (MD_SB_BYTES / 4)
-#define MD_SB_BLOCKS (MD_SB_BYTES / BLOCK_SIZE)
-#define MD_SB_SECTORS (MD_SB_BYTES / 512)
-
-/*
- * The following are counted in 32-bit words
- */
-#define MD_SB_GENERIC_OFFSET 0
-#define MD_SB_PERSONALITY_OFFSET 64
-#define MD_SB_DISKS_OFFSET 128
-#define MD_SB_DESCRIPTOR_OFFSET 992
-
-#define MD_SB_GENERIC_CONSTANT_WORDS 32
-#define MD_SB_GENERIC_STATE_WORDS 32
-#define MD_SB_GENERIC_WORDS (MD_SB_GENERIC_CONSTANT_WORDS + MD_SB_GENERIC_STATE_WORDS)
-#define MD_SB_PERSONALITY_WORDS 64
-#define MD_SB_DESCRIPTOR_WORDS 32
-#define MD_SB_DISKS 27
-#define MD_SB_DISKS_WORDS (MD_SB_DISKS*MD_SB_DESCRIPTOR_WORDS)
-#define MD_SB_RESERVED_WORDS (1024 - MD_SB_GENERIC_WORDS - MD_SB_PERSONALITY_WORDS - MD_SB_DISKS_WORDS - MD_SB_DESCRIPTOR_WORDS)
-#define MD_SB_EQUAL_WORDS (MD_SB_GENERIC_WORDS + MD_SB_PERSONALITY_WORDS + MD_SB_DISKS_WORDS)
-
-/*
- * Device "operational" state bits
- */
-#define MD_DISK_FAULTY 0 /* disk is faulty / operational */
-#define MD_DISK_ACTIVE 1 /* disk is running or spare disk */
-#define MD_DISK_SYNC 2 /* disk is in sync with the raid set */
-
-typedef struct md_device_descriptor_s {
- md_u32 number; /* 0 Device number in the entire set */
- md_u32 major; /* 1 Device major number */
- md_u32 minor; /* 2 Device minor number */
- md_u32 raid_disk; /* 3 The role of the device in the raid set */
- md_u32 state; /* 4 Operational state */
- md_u32 reserved[MD_SB_DESCRIPTOR_WORDS - 5];
-} md_descriptor_t;
-
-#define MD_SB_MAGIC 0xa92b4efc
-
-/*
- * Superblock state bits
- */
-#define MD_SB_CLEAN 0
-#define MD_SB_ERRORS 1
-
-typedef struct md_superblock_s {
- /*
- * Constant generic information
- */
- md_u32 md_magic; /* 0 MD identifier */
- md_u32 major_version; /* 1 major version to which the set conforms */
- md_u32 minor_version; /* 2 minor version ... */
- md_u32 patch_version; /* 3 patchlevel version ... */
- md_u32 gvalid_words; /* 4 Number of used words in this section */
- md_u32 set_magic; /* 5 Raid set identifier */
- md_u32 ctime; /* 6 Creation time */
- md_u32 level; /* 7 Raid personality */
- md_u32 size; /* 8 Apparent size of each individual disk */
- md_u32 nr_disks; /* 9 total disks in the raid set */
- md_u32 raid_disks; /* 10 disks in a fully functional raid set */
- md_u32 md_minor; /* 11 preferred MD minor device number */
- md_u32 gstate_creserved[MD_SB_GENERIC_CONSTANT_WORDS - 12];
-
- /*
- * Generic state information
- */
- md_u32 utime; /* 0 Superblock update time */
- md_u32 state; /* 1 State bits (clean, ...) */
- md_u32 active_disks; /* 2 Number of currently active disks */
- md_u32 working_disks; /* 3 Number of working disks */
- md_u32 failed_disks; /* 4 Number of failed disks */
- md_u32 spare_disks; /* 5 Number of spare disks */
- md_u32 gstate_sreserved[MD_SB_GENERIC_STATE_WORDS - 6];
-
- /*
- * Personality information
- */
- md_u32 layout; /* 0 the array's physical layout */
- md_u32 chunk_size; /* 1 chunk size in bytes */
- md_u32 pstate_reserved[MD_SB_PERSONALITY_WORDS - 2];
-
- /*
- * Disks information
- */
- md_descriptor_t disks[MD_SB_DISKS];
-
- /*
- * Reserved
- */
- md_u32 reserved[MD_SB_RESERVED_WORDS];
-
- /*
- * Active descriptor
- */
- md_descriptor_t descriptor;
-
-} md_superblock_t;
-
-/*
- * options passed in raidstart:
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
*/
-#define MAX_CHUNK_SIZE (4096*1024)
+#ifndef MD_MAJOR
+#define MD_MAJOR 9 /* we also check at runtime */
+#endif
-struct md_param
-{
- int personality; /* 1,2,3,4 */
- int chunk_size; /* in bytes */
- int max_fault; /* unused for now */
-};
+#define GET_ARRAY_INFO _IOR (MD_MAJOR, 0x11, struct md_array_info)
-typedef struct md_array_info_s {
+struct md_array_info {
/*
* Generic constant information
*/
- md_u32 major_version;
- md_u32 minor_version;
- md_u32 patch_version;
- md_u32 ctime;
- md_u32 level;
- md_u32 size;
- md_u32 nr_disks;
- md_u32 raid_disks;
- md_u32 md_minor;
- md_u32 not_persistent;
+ __uint32_t major_version;
+ __uint32_t minor_version;
+ __uint32_t patch_version;
+ __uint32_t ctime;
+ __uint32_t level;
+ __uint32_t size;
+ __uint32_t nr_disks;
+ __uint32_t raid_disks;
+ __uint32_t md_minor;
+ __uint32_t not_persistent;
/*
* Generic state information
*/
- md_u32 utime; /* 0 Superblock update time */
- md_u32 state; /* 1 State bits (clean, ...) */
- md_u32 active_disks; /* 2 Number of currently active disks */
- md_u32 working_disks; /* 3 Number of working disks */
- md_u32 failed_disks; /* 4 Number of failed disks */
- md_u32 spare_disks; /* 5 Number of spare disks */
+ __uint32_t utime; /* 0 Superblock update time */
+ __uint32_t state; /* 1 State bits (clean, ...) */
+ __uint32_t active_disks; /* 2 Number of currently active disks */
+ __uint32_t working_disks; /* 3 Number of working disks */
+ __uint32_t failed_disks; /* 4 Number of failed disks */
+ __uint32_t spare_disks; /* 5 Number of spare disks */
/*
* Personality information
*/
- md_u32 layout; /* 0 the array's physical layout */
- md_u32 chunk_size; /* 1 chunk size in bytes */
-
-} md_array_info_t;
-
-typedef struct md_disk_info_s {
- /*
- * configuration/status of one particular disk
- */
- md_u32 number;
- md_u32 major;
- md_u32 minor;
- md_u32 raid_disk;
- md_u32 state;
-
-} md_disk_info_t;
-
-
-/*
- * Supported RAID5 algorithms
- */
-#define RAID5_ALGORITHM_LEFT_ASYMMETRIC 0
-#define RAID5_ALGORITHM_RIGHT_ASYMMETRIC 1
-#define RAID5_ALGORITHM_LEFT_SYMMETRIC 2
-#define RAID5_ALGORITHM_RIGHT_SYMMETRIC 3
+ __uint32_t layout; /* 0 the array's physical layout */
+ __uint32_t chunk_size; /* 1 chunk size in bytes */
+};
projects / thirdparty / xfsprogs-dev.git / commitdiff
